"I've always had motivation, but things like that happen and you can just use it as extra motivation," Williams told Josh Katzenstein of The Times-Picayune of the missed play.
The Saints safety earned 73 tackles and four interceptions in 15 starts last season, but all anyone remembers is him dipping his head early and missing Diggs on that infamous missed tackle.
Williams doesn't want to talk much about the mistake but said he's heard plenty of kind words since the loss.
"Everybody has words of encouragement," he said. "I just listen to bits and pieces, and I just keep them in my head. But, you got to move past it.
"Everybody messes up. Nobody is perfect, so I have to let it go."